Antonelli's title margin is so big that Mexico may end the season early

Most title runs are settled by a late swing, a retirement or a penalty. Kimi Antonelli's is settled by arithmetic. He leads his Mercedes teammate George Russell by 123 points and Lewis Hamilton by 124, and a ninth-place finish at the Mexico City GP is enough to make him champion whatever anyone else does.

A cushion bigger than the calendar

Sky Sports calculates that a maximum of 100 points remain after Mexico. The lead over Russell and Hamilton already exceeds that figure, so the only question is whether Antonelli collects the last small piece of points he needs on Sunday. Ninth place is worth two points, and that is the whole job.

The scenarios are lenient beyond that. Any finish at all clinches the title if neither Russell nor Hamilton wins the race. Tenth place works only if Hamilton wins. Antonelli would need a bad weekend and a rival's perfect one for the championship to run past Mexico at all.

That is the real story of the Mercedes season. The car won races, and it also put one driver so far clear that the four rounds after Mexico, the last of which is Abu Dhabi, could become a victory lap. Russell, the driver best placed to stop it, sits in the same garage and is 123 points back.

ESPN adds a wrinkle. The Qatar and Abu Dhabi races could be cancelled because of US and Iran escalation, in which case F1 plans a single race at Imola worth 75 points. ESPN says Antonelli would already have clinched by then. The cushion covers the calendar even if the calendar shrinks.

The age record

Antonelli was born on 25 August 2006, which makes him 20 years, 2 months and 7 days old on Mexico race day. Sebastian Vettel holds the youngest-champion mark, set in 2010 at 23 years and 134 days. Antonelli would beat it by more than three years. Sky Sports and ESPN both describe him as the youngest champion ever if he finishes the job.

A record broken by that much says something about how the title was won. Antonelli did not need a single hot streak or a rival's collapse. He built a lead that survives a poor race, a retirement and most of a bad month.

What Sunday looks like

For the gap to hold, Antonelli has to finish outside the top nine and a rival has to win. Russell and Hamilton can only delay the party if both things happen on the same afternoon. That combination is why the clinching scenarios read as a checklist and not a threat.

If he scores, the final rounds become a question of how a champion is celebrated. If he does not, Antonelli still arrives in São Paulo with a lead that remains far larger than anything his rivals can realistically take back.